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Post  dave d on June 26th 2012, 7:14 pm

Do any of you engine builders use main restrictors when running stroker motors,running 4.5 stroke with 6.8 rod-street 545. I've had some people tell me the reason i can't get oil pressure is because of no restrictors and the machine shop that did my motor didn't put any in. Running solid roller cam,made 5 good passes fri at ethridge running about 45-50 lbs of pressure, number 6 pass lost oil pressure. Help Thanks dave
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Post  Lem Evans on June 26th 2012, 7:16 pm

The restrictors from the main to the cam bearings? If so, I do not use them.

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Post  dave d on June 26th 2012, 7:36 pm

Thanks ,also the pushrods that I'm running have 90thousand oil hole ---is this to much seems to be getting alot of oil up on top when priming
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Post  cool40 on June 26th 2012, 7:56 pm

are your lifters in with the bars down?
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Post  dave d on June 26th 2012, 8:24 pm

oil holes are away from oil galley, check that one all ready,Thanks,,sorry i didn't get to meet you over the weekend next time
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Post  cool40 on June 26th 2012, 8:58 pm

dave d wrote:oil holes are away from oil galley, check that one all ready,Thanks,,sorry i didn't get to meet you over the weekend next time
i walked up where you were parked but did'nt see you but i did see you go down the track.
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Post  rmcomprandy on June 26th 2012, 10:07 pm

dave d wrote:oil holes are away from oil galley, check that one all ready,Thanks,,sorry i didn't get to meet you over the weekend next time

What lifters are you running...?

I never restrict oil to the cam bearings, (unless it's a roller cam bearing where the cage blocks the hole itself). For that long stroke, I do machine the slot in the main bearing to a 9/32" hole aligning with the block oil feed hole to that main.
Some people only "hole" the center three mains and some claim even THAT is totally unnecessary.

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Post  BOSS 429 on June 28th 2012, 12:23 am

dave d wrote:Do any of you engine builders use main restrictors when running stroker motors,running 4.5 stroke with 6.8 rod-street 545. I've had some people tell me the reason i can't get oil pressure is because of no restrictors and the machine shop that did my motor didn't put any in. Running solid roller cam,made 5 good passes fri at ethridge running about 45-50 lbs of pressure, number 6 pass lost oil pressure. Help Thanks dave


YES, solid roller cam we use them, feel free to call me, but you may have more then one problem
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Post  ThndrChkn on June 28th 2012, 2:02 am

BOSS 429 wrote:
dave d wrote:Do any of you engine builders use main restrictors when running stroker motors,running 4.5 stroke with 6.8 rod-street 545. I've had some people tell me the reason i can't get oil pressure is because of no restrictors and the machine shop that did my motor didn't put any in. Running solid roller cam,made 5 good passes fri at ethridge running about 45-50 lbs of pressure, number 6 pass lost oil pressure. Help Thanks dave


YES, solid roller cam we use them, feel free to call me, but you may have more then one problem

^^^^^ X2 ^^^^^

I've used the FRPP ones on all of my race stuff, and have never had an issue with pressure due to the restrictors themselves. Luckily, none at all...
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